Preparation and properties of polyimide dielectric nanocomposites containing polyvinylpyrrolidone chemically functionalized barium titanate by in‐situ synthesis compounding

Yang, Shang Ke; Zhang, Zhao Xin; Zhang, Ai Ping; Lin, Hai; Zhang, Xun Tao; Xiao, Liu Xin; Bian, Jun; Chen, Dai Qiang

doi:10.1002/app.53231

Cited by 5 publications

(1 citation statement)

References 40 publications

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“…65 Subsequently, the polyimide nanocomposite films own superior physical properties, relative to neat polyimide films. [66][67][68] In this respect, nanocarbon nanofillers have been filled in the polyimide films. [69][70][71] The polyimide/carbon nanotube nanocomposite films have been developed.…”

Section: Polyimide/fullerene Nanocomposite Filmsmentioning

confidence: 99%

State-of-the-art of polyimide films reinforced with fullerene-design, features and applications

Kausar

2023

Journal of Thermoplastic Composite Materials

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Polyimide belongs to the class of high performance polymers containing imide functionalities in the backbone. Polyimide has wide ranging properties of optical transparency, heat stability, mechanical strength, dimensional stability, thermal conductivity, dielectric properties, etc. Fullerene is a zero dimensional hollow symmetrical nanocarbon, frequently employed as nanofiller in the polymers. Fullerene has been reinforced in the polyimide films to further augment the exclusive features and performance. This state-of-the-art review basically emphases the fundamentals, structure, properties, and applications of polyimide films, especially the films reinforced with fullerene nanofiller. The polyimide/fullerene nanocomposite films have been prepared using facile routes such as solution casting, spin casting, in situ method, and other film forming methods. Fullerene nanofiller has been filled in numerous designed polyimides. Number of experimental and theoretical studies have been performed on the high performance polymer/fullerene nanocomposite films. The structural diversity of the polymer/fullerene nanocomposite films and inimitable characteristics have led to significant applications in the optoelectronic devices, photodetectors, and sensors.

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Section: Polyimide/fullerene Nanocomposite Filmsmentioning

confidence: 99%

State-of-the-art of polyimide films reinforced with fullerene-design, features and applications

Kausar

2023

Journal of Thermoplastic Composite Materials

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Polyimide nanocomposites for high‐temperature capacitive energy storage applications by incorporating functional graphene oxide nanosheets: Design, preparation, and mechanism

Ni,

Zhang,

Zhang

et al. 2024

J of Applied Polymer Sci

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Herein, graphene oxide (GO) and its derivative, reduced GO (rGO) and p‐phenylenediamine (PPD) functionalized GO (GO‐g‐PPD) were first synthesized and selected as dielectric fillers, and then GO/polyimide (PI), rGO/PI, and GO‐g‐PPD/PI dielectric nanocomposites were fabricated through in situ polymerization‐composition strategy. Fourier transform infrared, Ram, and x‐ray diffraction analysis confirmed the success synthesis of rGO and GO‐g‐PPD dielectric fillers. The mechanical properties showed that GO‐g‐PPD/PI nanocomposites exhibited the highest tensile strength and elasticity modulus. TGA analysis revealed that the enhancement of thermal stability by addition of dielectric fillers. The dielectric constant of 2.5 wt.% GO‐g‐PPD/PI nanocomposites reached 25.05, which was 8.55 times that of pure PI (2.93). Energy storage performance tests showed that the energy storage density of GO‐g‐PPD/PI containing 2 wt.% filler reached 0.77 J/cm3, which was 71% higher than pure PI. These findings underscore the potential of GO derivative as a cost‐effective reinforcement for PI dielectric nanocomposites for high‐temperature capacitive energy storage applications.

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Dynamically frequency‐tunable and environmentally stable microwave absorbers

Liu,

Wu,

Liu

et al. 2024

Carbon Energy

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The threat to information security from electromagnetic pollution has sparked widespread interest in the development of microwave absorption materials (MAMs). Although considerable progress has been made in high‐performance MAMs, little attention was paid to their absorption frequency regulation to respond to variable input frequencies and their stability and durability to cope with complex environments. Here, a highly compressible polyimide‐packaging carbon nanocoils/carbon foam (PI@CNCs/CF) fabricated by a facile vacuum impregnation method is reported to be used as a dynamically frequency‐tunable and environmentally stable microwave absorber. PI@CNCs/CF exhibits good structural stability and mechanical properties, which allows precise absorption frequency tuning by simply changing its compression ratio. For the first time, the tunable effective absorption bandwidth can cover the whole test frequency band (2−18 GHz) with the broadest effective absorption bandwidth of 10.8 GHz and the minimum reflection loss of −60.5 dB. Moreover, PI@CNCs/CF possesses excellent heat insulation, infrared stealth, self‐cleaning, flame retardant, and acid‐alkali corrosion resistance, which endows it high reliability even under various harsh environments and repeated compression testing. The frequency‐tunable mechanism is elucidated by combining experiment and simulation results, possibly guiding in designing dynamically frequency‐tunable MAMs with good environmental stability in the future.

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Preparation and properties of polyimide dielectric nanocomposites containing polyvinylpyrrolidone chemically functionalized barium titanate by in‐situ synthesis compounding

Cited by 5 publications

References 40 publications

State-of-the-art of polyimide films reinforced with fullerene-design, features and applications

State-of-the-art of polyimide films reinforced with fullerene-design, features and applications

Polyimide nanocomposites for high‐temperature capacitive energy storage applications by incorporating functional graphene oxide nanosheets: Design, preparation, and mechanism

Dynamically frequency‐tunable and environmentally stable microwave absorbers

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